Being as I don't have much experience with sps... under any kind of lighting, do you really think this would be very useful in proving anything when the picture on the right, the sps is almost starting to be covered with hair algae? I am not doubting that sps can't be kept under anything less than halide, I just don't think this is a fair example when i know many people around me who do have nice sps tanks under pc.
edit- I don't know much about sps but they do say the have the hardy ones, like the montiporos.